Table 2 Summary statistics of MMP male household heads’ all US trips

Duration of each trip (months)

17.79

37.98

14.12*

28.53

71.16

86.81

Age (years)

34.11

9.69

34.16*

9.70

33.37

9.55

Years of schooling

4.27

3.43

4.11*

3.36

6.58

3.62

Consensual union (%)

4

20

4*

19

10

30

Never married (%)

1

11

1*

10

5

21

Once married but not now (%)

0.4

6

0.4*

6

1

11

Currently married (%)

94

23

95*

22

84

36

Num. of children under 18

3.02

2.34

3.07*

2.36

2.24

1.82

Num. of adult children

0.60

1.62

0.60

1.63

0.51

1.49

Num. of daughters under 18

1.44

1.41

1.46*

1.42

1.12

1.26

Num. of sons under 18

1.48

1.43

1.51*

1.45

1.05

1.09

Num. of children aged 0–4

0.96

0.96

0.99*

0.97

0.61

0.75

Num. of children aged 5–8

0.83

0.97

0.84*

0.98

0.55

0.77

Num. of children aged 9–12

0.69

0.97

0.70*

0.98

0.48

0.77

Num. of children aged 13–16

0.53

0.91

0.54*

0.92

0.41

0.74

Num. of children aged 17–18

0.21

0.48

0.21

0.48

0.18

0.44

Num. of children under 18 traveling

0.05

0.33

0.04*

0.29

0.13

0.63

Num. of children under 18 waiting

2.97

2.33

3.03*

2.35

2.11

1.81

Num. of adult children traveling

0.04

0.28

0.04*

0.26

0.08

0.46

Num. of adult children waiting

0.56

1.54

0.57*

1.56

0.43

1.32

Num. of sons under 18 traveling

0.03

0.22

0.03*

0.21

0.07

0.39

Num. of daughters under 18 traveling

0.02

0.17

0.01*

0.15

0.06

0.34

Num. of sons under 18 waiting

1.45

1.42

1.49*

1.44

0.98

1.07

Num. of daughters under 18 waiting

1.42

1.41

1.44*

1.42

1.06

1.24

Spouse traveling with (%)

3

17

3*

16

8

27

Spouse visited (%)

1

11

1*

9

6

24

Spouse waiting (%)

96

20

97*

18

86

35

Number of US trips

6.18

6.57

6.36*

6.66

3.53

4.20

Green card or citizenship (%)

25

43

25*

43

34

47

Visa (%)

15

35

16*

36

3

16

Travel illegally (%)

60

49

60*

49

63

48

IRCA (%)

39

49

36*

48

82

39

Distance between Mexico-US (km)

1418

375

1415*

375

1462

374

US unemployment rate

6.07

1.47

6.09*

1.48

5.81

1.23

Mexico unemployment rate

4.55

1.66

4.62*

1.67

3.78

1.33

Exchange rate

2.60

3.43

2.36*

3.27

5.50

3.99

Num. of observations